Let's not say "free music"!
When stumbling across the word free in the internet, I often realize,
it's actually not free...

Maybe more convincing:
We want the people to support the music and pay for it,
so it's actually not free (in that meaning)

"Free" isn't associated with "good" in this commercial world.
"High price" is associated with "good"!
When buying a dvd-player, I assume, the more money I investigate,
the better it is.

Let me suggest calling it "Value Music". (or worth music? ..my english....)
It's value music, because it has more value for everyone.
It has more value to the artist:
he/she gets more freedom
he/she can better spread his creations

The customer has more value:
he/she gets more freedom
he/she can get the music faster (just downlaod)
he/she can determine the price paid himself/herself